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类型 基础研究 预答辩日期 2017-12-02
开始(开题)日期 2015-11-23 论文结束日期 2016-11-23
地点 化工楼小会议室319 论文选题来源 国家自然科学基金项目     论文字数 5.3 (万字)
题目 功能化纳米粒子的制备及其多种应用
主题词 正硅酸四乙酯,硅烷偶联剂,功能化,超疏水涂层
摘要 在本文中,我们对多种不同纳米粒子进行了改性,制备得到了多种不同功能的纳米粒子,在第一章中,在乙醇的水溶液中,通过正硅酸四乙酯(TEOS)作为原料制备得到了二氧化硅纳米粒子前驱体(SiO2),在使用氨水作为催化下先制备得到SiO2纳米粒子前驱体溶液;之后,再向所得的SiO2纳米粒子前驱体溶液中加入TEOS和1H,1H,2H,2H-全氟癸基三乙氧基硅烷(HDFTES),通过共水解缩合反应制备得到了具有树莓结构的F-Si@Si纳米粒子。这种含有树莓粒子的乙醇分散液可以直接喷涂在基材上,使被喷涂的基材获得超疏水性。此外,还对涂层的多项性能进行了测量,结果表明该涂层机械性能良好。之后,并对树莓粒子的形成机理进行了研究和讨论。 在第二章节中,我们报道了一种简单便捷的方法制备纳米复合物,制备得到的纳米复合物可以用来制备双疏性涂层,并且这种方法可以在一步内获得目标产物。这种F-Si@PMAA纳米复合物具有二元结构,且壳层较粗糙;这个二元结构是通过正硅酸四乙酯(TEOS)和1H,1H,2H,2H-全氟癸基三乙氧基硅烷(HDFTES)在PMAA纳米粒子表面通过共水解缩合制备得到的,反应是在PMAA纳米粒子的乙醇分散液中进行的。得到的纳米复合物的分散液可以直接用于喷涂在不同基材表面,而所有喷涂过纳米复合物的涂层都表现出了很好的双疏性能——超疏水性和高疏油性,其中水的接触角和滚动角分别约为150o和4o,油的接触角也超过了130o。此外,制备的涂层在水压冲击实验和砂纸实验后依旧保佑着抗水性。本实验制备双疏性涂层的方法简单有效,是一种有可能日后进行大规模工业生产的方法。 在第三章节中,我们通过一个两步法制备了一种多层核壳纳米复合物。第一步,首先在二氧化硅纳米粒子表面使用正硅酸四乙酯(TEOS)和3-甲基丙烯酰氧基丙基三甲氧基甲硅烷(MPS)共水解缩合制备出MPS/SiO2核壳纳米粒子。第二步,通过甲基丙烯酸十八酯(ODMA)和MPS/SiO2核壳纳米粒子表面的C=C键的共聚合反应在MPS/SiO2核壳纳米粒子表面在形成一层高分子壳得到最终的PODMA/MPS/SiO2多层纳米复合物。所制得的多层纳米复合物可以直接制成具有耐热性的疏水涂层,所制得涂层不仅疏水性良好,接触角大于130o,而且表现出很好的耐高温稳定性。此外,所制得的多层纳米复合物还可以用作纳米原油降稠剂,能使原油的粘度下降80%。PODMA/MPS/SiO2多层纳米复合物所具有这些很好的实用优点,在实际工业生产中是存在着潜在的应用价值的。 在第四章节中,通过一种简便的水解缩合的方法成功制得了含有不同官能团的硅氧烷@聚甲基丙烯酸核壳纳米粒子。三种不同的硅烷偶联剂3-(甲基丙级酰氧基)丙基三甲氧基硅烷(MPS),3-氨基丙基三乙氧基硅烷(APTES)和3-缩水甘油氧基丙基三甲氧基硅烷(GPTMS)分别和正硅酸四乙酯(TEOS)加入到聚甲基丙烯酸纳米粒子的乙醇分散液中制备得到三种还有不同官能团的Si@PMAA核壳纳米粒子。Si@PMAA核壳纳米粒子中的核壳结构和表面官能团分别通过透射电子显微镜和红外光谱分析进行表征和确定。Si@PMAA核壳纳米粒子相关的制备条件和制备方法也在本章节中进行了详细的讨论。另外,实验证明这种共水解缩合的方法不仅可以应用在PMAA纳米粒子上,而且可以应用到其他表面带有活性基团的纳米粒子上。与此同时,我们运用表面带有C=C键和-NH2官能团的核壳纳米粒子进一步应用在了疏水涂层的制备上。
英文题目 PREPARATION AND APPLICATIONS OF FUNCTIONAL NANOPARTICLES
英文主题词 tetraethoxysilane, silane coupling agents, functional, superhydrophobic
英文摘要 In this paper, we have done much work about preparation of functional nanomaterials. In the first part, a facile and effective method to fabricate raspberry-like nanoparticles is reported in a one-pot reaction. This method consists of two steps: preparation of silicananoparticle precursors dispersion via the Stoberprocess and growth of the tiny functionalfluoride-silicananoparticles on the surface of silica nanoparticle precursors via the hydrolysis-condensation reaction of tetraethoxysilane (TEOS) and 1H,1H,2H,2H-Perfluorodecyl triethoxysilane (HDFTES). The obtained raspberry-like nanoparticle dispersion could be spraycoated onto differentsubstratesdirectly with the water contact angle greater than 150° and water roll-off angle less than 4°. And the prepared coatings maintained water resistance after water jetting, sand abrasion. This method can be an effective strategy for fabricating superhydrophobic surfaces for practicalindustrial applications. In the second part, a facile and effective method to fabricate hybrid nanocomposites for amphiphobic coatings is reported in a one-step reaction. The F-Si@PMAA hybrid nanocomposites with rough dual structure were prepared via the co-condensation reaction of tetraethoxysilane (TEOS) and 1H,1H,2H,2H-Perfluorodecyl triethoxysilane (HDFTES) on the surface of the pre-synthesized PMAA nanoparticles in ethanol dispersion. The resulting hybrid nanocomposites dispersion could be spray coated onto different substrates directly. All the coated substrates exhibited good amphiphobicity that superhydrophobicity with the water contact angle greater than 150° and water roll-off angle less than 4° and high oleophobicity with the oil contact angle greater than 130o. Moreover, the prepared coatings maintained water resistance after water jetting, sand abrasion. This method can be an effective strategy for fabricating amphiphobic surfaces for practical industrial applications. In the third part, a multi-layer core-shell nanoparticle with multiple functions was prepared by a two-step process. First, the hydrolysis-condensation reaction of 3-methacryloxypropyl trimethoxysilane (MPS) and tetraethoxysilane (TEOS) was performed on the surface of the pre-synthesized SiO2 nanoparticles to form the MPS/SiO2 core-shell nanoparticles. Second, the copolymerization of octadecyl methacrylate (ODMA) monomers with C=C bonds was carried out on the surface of MPS/SiO2 nanoparticles to form PODMA/MPS/SiO2 multi-layer nanocomposite. The hybrid nanocomposite could be used directly as the thermostable hydrophobic coatings. The prepared coatings not only were hydrophobic with the water contact angle greater than 130o, but also exhibited high heat resistance. Moreover, the hybrid nanocomposite could also be used as nano viscosity depressants for crude oil. The viscosity of crude oil could be reduced more than 80%. Owing to these good practical advantages, the PODMA/MPS/SiO2 hybrid nanocomposites may have some potential applications in practical industrial production. In ther fourth part, siloxane @ poly (methylacrylic acid) core-shell nanoparticles with functional groups were prepared by a facile hydrolysis-condensation method in this work. Three different silane coupling agents 3-methacryloxypropyltrimethoxysilane (MPS), 3-triethoxysilylpropylamine (APTES), 3-glycidoxypropyltrimethoxy silane (GPTMS) were added along with tetraethoxysilane (TEOS) into the polymethylacrylic acid (PMAA) nanoparticles ethanol dispersion to form the Si@PMAA core-shell nanoparticles with different functional groups. The core-shell structure and the surface special functional groups of the resulting nanoparticles were measured by TEM and FTIR. The corresponding preparation conditions and mechanism were discussed in detail. This hydrolysis-condensation method also could be used to functionalize other nanoparticles which contain active groups on the surface. Meanwhile, the Si@PMAA core-shell nanoparticles with carbon-carbon double bonds and amino groups have further been applied to prepare hydrophobic coatings.
学术讨论
主办单位时间地点报告人报告主题
东南大学化学化工学院 2015-4-15 化工旧楼小会议室 赵正柏 水凝胶镜片相关问题
海昌隐形眼镜公司 2015-5-21 海昌办公楼 赵正柏 硅水凝胶隐形眼镜研究进展
东南大学化学化工学院 2016-4-16 化工旧楼小会议室 赵正柏 硅水凝胶表面疏水性与相区的关系
东南大学化学化工学院 2016-10-10 化工旧楼小会议室 川口春马 教授 MICRO-GELS CONTAINING NANO-PARTICLES:Preparation, characterization and applications
东南大学化学化工学院 2016-9-6 人文素质教育报告厅教一-111 李全 刺激诱导构建液晶纳米结构的研究和应用:从动态光子到再生能源
东南大学化学化工学院 2016-4-16 化工楼旧楼大会议室 辛嘉英 教授 基于甲烷氧化菌素修饰电极的颗粒性甲烷单加氧酶催化甲烷氧化研究
东南大学化学化工学院 2015-10-23 化工旧楼小会议室 赵正柏 硅水凝胶的合成制备
东南大学化学化工学院 2016-6-18 化工旧楼小会议室 Dr. Alessandro Stroppa Ferroelectric polarization and interplay with spin-orbit properties in perovskite halides
     
学术会议
会议名称时间地点本人报告本人报告题目
The 12th China-Japan Joint Conference on Composite Materials 2016-9-14-18 日本 高知 Preparation and Properties of Poly(Octadecyl Methacrylate)@Silica-(3-Methacryloxypropyl Trimethoxysilane)@Silica Multi-layer Core-shell Nanocomposite
第十一届中美华人纳米论坛 2016-6-18-20 中国 南京 One-pot Fabrication of Fluoride-Silica@Silica Raspberry-like Nanoparticles for Superhydrophobic Coating
     
代表作
论文名称
The Relationship between the Hydrophilicity and Surface Chemical Composition Microphase Separation S
One-pot fabrication of fluoride-silica@silica raspberry-like nanoparticles for superhydrophobic coat
A multi-responsive multicomponent hydrogel with micro-phase separation structure: Synthesis and spec
 
答辩委员会组成信息
姓名职称导师类别工作单位是否主席备注
周建成 正高 教授 博导 东南大学
叶树集 正高 教授 博导 中国科学技术大学
黄军 正高 教授 博导 南京工业大学
张天柱 正高 教授 博导 东南大学
王志飞 正高 教授 博导 东南大学
      
答辩秘书信息
姓名职称工作单位备注
程林 副高 副教授 东南大学